>2xx1F (F:) observed residues (from ATOM records)
dadklphtkvtlvappqvhpheqatksgpkvveftmtieekkmviddkgttlqamtfngs
mpgptlvvhegdyvqltlvnpatnamphsvdfhgatgalggakltnvnpgeqatlrfkad
rsgtfvyhcapegmvpwhvvsgmsgtlmvlprdglkdpqgkplhydraytigefdlyipk
gpdgkykdyatlaesygdtvqvmrtltpshivfngkvgaltganaltakvgetvllihsq
anrdtrphligghgdwvwetgkfanppqrdletwfirggsagaalytfkqpgvyaylnhn
lieafelgaaghikvegkwnddlmkqikapapipr